The damage period is on the tender leaves, the light damage, the plant growth is affected. Serious will cause the plant to wither, the leaf area will die, finally the whole plant will die.
If a large number of aphids are found to be harmful, chemical control should be carried out.
In the proportion of 1:10, the whole plant was sprayed once after about 5 hours.
The solution of washing powder, urea and water can be prepared with the ratio of 1:3:300 to spray the whole plant. About 2-3 times.
Or spray once with 900 times of 12% Omethoate emulsion or 1100-1600 times of Mara sulfur emulsion, or spray once with 900 times of dichlorvos emulsion or 14000-19000 times of Gaobo (70% imidacloprid) dispersing granule.
Red spider propagates rapidly, weeds, plant branches and other environments can propagate, which endangers the whole plant, can be mixed on the plant for several generations at the same time, and the whole plant will die when the harm is serious.
When the mixture of sulphuric acid, salt and water (10:1:1:40) is used uniformly, the application of "white" can not only prevent the old larva from overwintering in the shallow soil layer, but also prevent the larva of the moth from overwintering in the spring.
40% dicofol emulsifiable concentrate 1500 times to kill spider.
The adult damage of coir moth appears in the afternoon, and the male likes to move in the evening or in the morning.
After hatching, the larvae usually feed on the eggshell in the afternoon of 1-2 days, then climb up the branches and leaves or float to the nearby branches and leaves, spin silk and stick up the broken leaves to create a protective bag and start to eat.
When the larva bites the leaves, shoots or peels the branches and fruit cortex in the protective bag, it will cause local branches and leaves to be completely absent, leading to the death of the plant.
When the quantity is small, it can be killed manually and burned in a centralized way.
In case of serious insect damage, spray 2050 times of fenpropathrin, 900 times of 85% dichlorvos emulsion or 1500 times of 80% trichlorfon crystal at larval stage.
